"There is one evening scene in Pittsburg which no visitor should miss. Owing to the abruptness of the hill behind the town, there is a street along the edge of the bluff, from which you can look directly down upon all that part of the city which lies low, near the level of the rivers. On the evening of this dark day, we were conducted the edge of the abyss, and looked over the iron railing upon the most striking spectacle we ever beheld. The entire space lying between the hills was filled with the blackest smoke, from out of which the hidden chimneys sent forth tongues of flame, while from the depths of the abyss came up the noise of hundreds of steam-hammers. There would be moments when no flames were visible; but soon the wind would force the smoky curtains aside, and the whole black expanse would be dimly lighted with dull wreaths of fire. It is an unprofitable business, view-hunting; but if any one would enjoy a spectacle as striking as Niagara, he may do so by simply walking up a long hill to Cliff Street in Pittsburg, and looking over into - hell with the lid taken off. Such is the kind of day of which Pittsburg boasts. The first feeling of the stranger is one of compassion for the people who are compelled to live in such an atmosphere. When hard pressed, a son of Pittsburg will not deny that the smoke has its inconveniences. He admits that is does prevent some inconsiderate people from living there, who, but for the prejudice against smoke in which they have been educated, would become residents of the place. He insists, however, that the smoke of bituminous coal kills malaria, and saves the eyesight. The smoke, he informs you, is a perpetual public sun-shade and color-subduer. There is no glare in Pittsburg, except from fire and red-hot iron; no object meets the eye that demands much of that organ, and consequently diseases of the eyes are remarkably rare. It is interesting to hear a Pittsburgher discourse on this subject; and it much relieves the mind of a visitor to be told, and to have the assertion proved, that the smoke, so far from being an evil, is a blessing. The really pernicious atmospheres, say the Pittsburg philosophers, convey to man no intimation of the poison with which they are laden, and we inhale death while enjoying every breath we draw; but this smoke is an evil only to the imagination, and it destroys every property of the atmosphere which is hostile to life. In proof of which the traveller is referred to the tables of mortality, which show that Pittsburg is the most favorable city in the world to longevity. All this is comforting to the benevolent mind. Still more so is the fact, that the fashion of living a few miles out of the smoke is beginning to prevail among the people of Pittsburg. Villages are springing up as far as twenty miles away, to which the business men repair, when, in consequence of having inhaled the smoke all day, they feel able to bear the common country atmosphere through the night. It is probable that, in the coming years, the smoky abyss of Pittsburg will be occupied only by factories and "works," and that nearly the whole population will deny themselves the privilege of living in the smoke. With three rivers and half a dozen railroads, the people have ready means of access to places of almost unequalled beauty and plesantness."